Article
Engineering, Mechanical
Tianyu Zhang, Xiaowei Wang, Xianxi Xia, Yong Jiang, Xiancheng Zhang, Liguo Zhao, Anish Roy, Jianming Gong, Shantung Tu
Summary: This paper develops a robust creep-fatigue interaction (CFI) life prediction model, which considers the effect of creep strain and demonstrates its broad applicability for various materials and loading conditions.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Mechanics
Kai Song, Dong Wang, Lei Zhao, Lianyong Xu, Yongdian Han
Summary: The creep-fatigue behavior of 9Cr3Co3W1CuVNbB steel under strain-controlled and hybrid stress-strain controlled conditions is studied. An improved method for predicting creep-fatigue life is proposed, which accurately predicts the relaxed stress and accumulated creep strain of the material. The influence of oxidation damage on nonlinear interactions is also considered.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Mechanics
Michal Bartosak, Jakub Horvath
Summary: Strain-controlled Low-Cycle Fatigue (LCF) and Thermo-Mechanical Fatigue (TMF) tests were conducted on silicon-molybdenum ductile cast iron SiMo 4.06. The LCF tests covered various mechanical strain amplitudes and temperatures, while the TMF tests were performed at different temperatures. The dominant failure modes involved graphite-matrix debonding and transgranular crack propagation through the ferritic matrix, which were analyzed. Additionally, a novel damage model based on the dissipated hysteresis energy was proposed for accurately predicting the lifetime of SiMo 4.06 under LCF and TMF loading, considering the separate calculations of creep and fatigue damage and indirect consideration of oxidation effects.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Xiao-Cheng Zhang, Jian-Guo Gong, Fu-Zhen Xuan
Summary: The study introduces a deep learning method for predicting the life of austenitic stainless steel under creep, fatigue, and creep-fatigue conditions. Results demonstrate that the deep learning model outperforms conventional machine learning models in terms of prediction accuracy and generalization ability.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Energy & Fuels
Soheila Riahi, Michael Evans, Martin Belusko, Ming Liu, Frank Bruno
Summary: This study investigates the impact of the orientation on the melting process and the consequent thermal stresses in a lab-scale latent heat shell and tube system using a combination of transient computational fluid dynamics and finite element analyses. The results show that the thermal stress is lower in the horizontal orientation, especially under the condition of a 100 K initial temperature difference.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Soheila Riahi, Michael Evans, Martin Belusko, Ross Flewell-Smith, Rhys Jacob, Frank Bruno
Summary: The study investigated the structural integrity of a lab-scale shell and tube latent heat thermal energy storage system under transient conditions, showing that the system has good structural integrity under a 50K temperature gradient during transient operation. Through thermoelastic and elastic-plastic analysis, the system can still operate under a higher temperature gradient of 100K and is reasonably protected against creep failure.
APPLIED THERMAL ENGINEERING
(2021)
Article
Polymer Science
Koh-hei Nitta, Kota Ito, Asae Ito
Summary: This paper investigates the impact of annealing time on the specific heat enthalpy of polystyrene above the glass transition temperature. The authors propose an extended model to describe the endothermic overshoot peaks using dynamic mechanical spectra. The study suggests that the enthalpy recovery behavior of glassy polystyrene has a common structural relaxation mode with linear viscoelastic behavior, and the retardation spectra evaluated from the dynamic mechanical spectra can be used as the recovery function of the endothermic overshoot.
Article
Nuclear Science & Technology
Xianfeng Chen, Shijun Qin, Qingfeng Wang, Jin Cao
Summary: This paper presents the design of the CFETR divertor and predicts the fatigue life of the hypervapotron plasma facing unit. Through optimization and numerical simulation, a fatigue life of approximately 1.2489 year was estimated for the CFETR divertor.
FUSION ENGINEERING AND DESIGN
(2022)
Article
Polymer Science
Olesja Starkova, Sergejs Gaidukovs, Oskars Platnieks
Summary: The viscoelastic behavior of industrial-grade amine-epoxy and corresponding nanocomposites with modified graphene oxide was studied using dynamic mechanical thermal analysis. Time-temperature, time-water aging, and coupled superposition principles were used to predict the long-term storage moduli of nanocomposites. A methodology for constructing master curves from DMTA temperature scans was developed, and the results were well correlated with predictions from traditional isothermal multifrequency test data. The parameters of relaxation models were analyzed in terms of filler and water-aging effects.
POLYMER DEGRADATION AND STABILITY
(2023)
Article
Mechanics
Biao Ding, Weili Ren, Yunbo Zhong, Xiaotan Yuan, Jianchao Peng, Tianxiang Zheng, Zhe Shen, Yifeng Guo, Weidong Xuan, Jianbo Yu, Josip Brnic, Peter K. Liaw
Summary: Experimental results showed a decrease in fatigue life with increasing dwell time, leading to significant cyclic softening.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Nanoscience & Nanotechnology
A. H. Pavan, R. L. Narayan, Shi-Hao Li, Kulvir Singh, U. Ramamurty
Summary: This study investigates the microstructure, hardness, impact toughness, and tensile properties of Haynes (R) 282 alloy after accelerated ageing. The results show that ageing promotes grain growth and precipitation of various phases and carbides, leading to a decrease in ductility and impact strength. The alloy shows serrated flow in high-temperature tensile tests, and the type of serrations depends on the ageing treatment. Fractographic examination reveals a transition from ductile fracture to brittle intergranular fracture with increasing ageing duration.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Engineering, Mechanical
Joshua A. Depiver, Sabuj Mallik, Emeka H. Amalu
Summary: Characterization of thermal fatigue response of different solder alloy formulations in BGA solder joints is crucial for predicting mean-time-to-failure. The predicted thermal fatigue lives of different solder alloys vary significantly, with SAC405 joints having the highest predicted TFL of approximately 13.2 years and SAC387 joints having the least life of approximately 1.4 years.
ENGINEERING FAILURE ANALYSIS
(2021)
Article
Engineering, Chemical
Sebastian Jobst, Markus Stommel
Summary: Material and lifetime modeling of silicone adhesives is crucial in the building and automotive industry. By characterizing an elastomeric silicone adhesive with different thermomechanical methods, key material parameters for lifetime prediction were identified. It was found that frequency and temperature dependence for strains beyond a certain threshold were negligible, making the time-temperature superposition principle ineffective for extrapolation.
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2022)
Article
Engineering, Mechanical
Biao Ding, Weili Ren, Yunbo Zhong, Xiaotan Yuan, Tianxiang Zheng, Zhe Shen, Yifeng Guo, Qiang Li, Jianchao Peng, Josip Brnic, Yanfei Gao, Peter K. Liaw
Summary: This study found that the generalized cyclic life saturation can be achieved through a dynamic equilibrium between straight single superdislocations and dislocation networks. The saturation phenomenon can be easily achieved by increasing local damage. The rate of change of straight single superdislocations is low in the range of large deformations.
INTERNATIONAL JOURNAL OF PLASTICITY
(2022)
Article
Engineering, Mechanical
A. Vahid Movahedi-Rad, Ghazaleh Eslami, Thomas Keller
Summary: This paper introduces a new fatigue life prediction methodology for viscoelastic materials that takes into account the creep effect and requires less input data. The model shows good prediction accuracy for materials under different stress ratios and proposes constant life diagrams (CLDs) and the concept of cyclic-creep interaction.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Nanoscience & Nanotechnology
Le Chang, Bin-Bin Zhou, Tian-Hao Ma, Jian Li, Xiao-Hua He, Chang-Yu Zhou
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Mechanical
Lei Lu, Jian Li, Chuan-Yi Su, Peng-Yan Sun, Le Chang, Bin-Bin Zhou, Xiao-Hua He, Chang-Yu Zhou
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Nanoscience & Nanotechnology
Le Chang, Bin-Bin Zhou, Tian-Hao Ma, Jian Li, Xiao-Hua He, Chang-Yu Zhou
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Engineering, Mechanical
Binbin Zhou, Changyu Zhou, Xiaochun Yu, Le Chang, Jian Li, Xinting Miao, Cheng Ye, Bojun Zhang
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2020)
Article
Engineering, Mechanical
Jian Li, Chuan-Yi Su, Lei Lu, Peng Zhang, Le Chang, Xin-Ting Miao, Bin-Bin Zhou, Xiao-Hua He, Chang-Yu Zhou
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2019)
Article
Nanoscience & Nanotechnology
Le Chang, Tian-Hao Ma, Jian-Bin Wen, Bin-Bin Zhou, Jian Li, Xiao-Hua He, Chang-Yu Zhou
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2019)
Article
Mechanics
Bin-bin Zhou, Chang-yu Zhou, Le Chang, Xiao-chun Yu, Cheng Ye, Bo-jun Zhang
COMPOSITE STRUCTURES
(2020)
Article
Engineering, Mechanical
Le Chang, Tian-Hao Ma, Bin-Bin Zhou, Jian-Bin Wen, Xiao-Hua He, Chang-Yu Zhou
INTERNATIONAL JOURNAL OF FATIGUE
(2019)
Article
Engineering, Mechanical
Jian-bin Wen, Chang-Yu Zhou, Xin Li, Xiang-Ming Pan, Le Chang, Guo-Dong Zhang, Fei Xue, Yan-Fen Zhao
INTERNATIONAL JOURNAL OF FATIGUE
(2019)
Article
Engineering, Mechanical
Le Chang, Takayuki Kitamura, Chang-Yu Zhou
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2020)
Article
Materials Science, Multidisciplinary
Le Chang, Chang-Yu Zhou, Xiao-Hua He
Summary: This study demonstrates the influence of twin boundaries on the strength and ductility of HCP metallic materials, revealing that (1 2 1 0) oriented twin boundaries exhibit higher ductility at low temperatures, while a brittle-ductile transition occurs with increasing strain rate and temperature.
Article
Engineering, Mechanical
Le Chang, Takayuki Kitamura, Chang-Yu Zhou, Xiao-Hua He
Summary: The comparison between 2D and 3D atomistic simulations of anisotropic crack tip response in hcp titanium shows significant differences in near tip stress fields, incipient crack tip deformation, and critical stress intensity factor. Crack tip plasticity is predominantly contributed by the inclined slip mode in 2D simulations, while the lower stress triaxiality in 3D simulations leads to easier dislocation nucleation. The behaviors observed in 3D simulations are more consistent with experimental results.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2021)
Article
Engineering, Mechanical
Tian-Hao Ma, Le Chang, Shen Guo, Ling-Rui Kong, Xiao-Hua He, Chang-Yu Zhou
INTERNATIONAL JOURNAL OF FATIGUE
(2020)
Article
Materials Science, Multidisciplinary
Han Aojie, Zhou Changyu, Chang Le, Li Jian
RARE METAL MATERIALS AND ENGINEERING
(2019)